A fix for the Intruder payload positions bug affecting some Linux users.

A "lean mode", for users who prefer less functionality and a smaller resource footprint.

I'm aiming to complete the final release fairly shortly, so if you have any problems or bugs, please let me know as soon as possible, either via email or in the comments. The new release requires Java version 1.5 or later, so make sure you have the latest JRE installed.